The 'with measures' (WM) projections reported by Member States take into account currently implemented and adopted policies and measures. Where countries have instead reported 'business as usual' or 'current legislation' projections, it is assumed for comparison purposes that these are equivalent to a WM projection. The 'with additional measures' projections reported by Member States take into account additional future planned policies and measures but which are not yet implemented.

Emissions
of acidifying pollutants (nitrogen oxides (NO X ), sulphur oxides (SO 2 )
and ammonia (NH 3 ) have decreased significantly in most of the individual
EEA member countries between 1990 and 2008. Emissions
of SO 2 have decreased by 74 %, NO X by 34 % and NH 3
emissions by 24 % since 1990. The EU-27
is on track to meet its overall target to reduce emissions of SO 2
and NH 3 as specified by the EU's NEC Directive (NECD). However a
large number of individual Member States, and the EU as a whole, anticipate
missing the 2010 emission ceilings set for NO X in the NECD, Of the three non-EU countries having emission ceilings set under the
UNECE/CLRTAP Gothenburg protocol (Liechtenstein, Norway and Switzerland), both
Liechtenstein and Norway also reported NO X emissions in 2008 that
were substantially higher than their respective 2010 ceilings.